No, its just not 2 people BTW. I just upgraded my shop a few days ago to the newest version (1-click-upgrade) 1.7.8.7 from v176x and have noticed this as well.
Something is going on. Never have I had so many weird registers with what the OP (ZIKODK) shows. Mine is looking pretty much the same.
Everything else on my shop has stayed the same, same modules, no changes...
It only happened when I upgraded to the newest version. Which was around 3-4 days ago.
Edit: for attached screenshot and weird customer names with random characters but some sort of valid email address:
